Process of regulating combustion.



PATENTED JULY 3, 1906. P. LARSEN.

PROCESS OF RBGULATING COMBUSTION.

APPLICATION FILED HAR.30. 1905.

h inessesx j /Z6071 au/ 92411014447) DOLZU To all w hont it'vrtalyconcern.-

' routiri iasnn, O 'O N AGEN DENMARK. giro class c? acon/arm soolvlsusrlou.

Be it known that I, Pour. LARsnN, a subject of the King of Denmark,residing in the city of Copenhagen, in-the Kingdom of Denmark, have madecertain new and useful Improvements in Processes 'of RegulatingComustion, ofwhich the followin is a specification, reference being hadto t e accompany-- midrawing, forming apart hereof.

order to regulate the combustion in a furnace it is customa to providemeans for varying the amount fuel or air or fuel mixture introducedtherein, whereby the work 'done by the furnace at any given momentdepends u on the amount of fuel in combustion at t at moment. I havediscovered that in many furnaces the combustion may ing t e point-orpoints of introduction into the furnace of the fuel, air, or both, orthey fuel mixture, as the case may be. Particularlyis this the case in arotary furnace, such as is commonly employed in the manufacture ofcement. Such a furnace generall has'a long cylindrical rotating memberslig tly inclined, in which the raw material 1s.introduced at its higherend and flows down through the cylinder to the lower end, from which itis dischar ed, and through which end the fuel is introduced. In suchfurnaces if the clinkering of the cement is not being properly effectedI have discovered that by moving the point of introduction ofthe fuel orfuel mixture farther into the cylinder the same effect is produced as ifthe uantity of fuel or fuel mixture were increase l versa.- I have alsodiscovered that the introduction of the fuel and air separately into thecylindrical combustion-chamber and the varying of the points ofintroduction of the air and fuel independently of each other roduces acorresponding re ulating e ect. Moreover, there are other a vantages inintroducing the air and fuel separately into the combustion-chamber-inthat it permits the quantity of-fuel mixture to be regulated with eataccuracy and in that the air may be eated to any degree of temperatureWithout danger of explosions, as occur when the air and fuel are heatedtogether or when the fuel is introduced through the same conduit withthe highly-heated air.

In the accompanying drawing, there is illustrated a portion of a furnacein which Specification of Letters meat.

Applicatloufllod March 80, 1906. Serial llo. 252.860. 7 I

' the invention may be practiced, although, as

ecarried out 1n other the tubes or and vice aid drawing represents incentral section the lower end of a rota furnace, showing pipes for t eintroduction of fuel and air. V v The combustion-chamber a ofsaidfurmice is cylindrical in construction and may be of any Suitablelength. Only the lower end of this chamber islshown; but, it will beunderstood that the up er end is adapted to receive the raw materiawhich, as the cylinder rotates, gravitates toward the lower end of thechamber, where it is discharged through an opening I) in a hood 0, whichcaps said lower end. Suitable means, which 1t 1s unnecessary toillustrate, are provided to Patented'J'uIy 3, 1906.

'efiect the rotation of the cylindrical chamber a, and the hood 0 isrigidlysecured to the foundation or supports for thefurnace, 1n theresent case to trucks (1. Throughthe hood 0, preferably at its centralortion, the means for su plying the fuel'or el mixture is introduced andextends 'into' the combustion-chamber a, In the present instance thefuel and air are introduced separately, the air entering through a pipeor conduit 0 and the fuel through a pipe'or conduit f, which ispreferably tivel or in any other suitable manner, and

for t e corresponding movement of the nozzle h a rod m and a handle nmay be provided. I j

In accordance with theinvention the air is heated to the desiredtemperature and introduced through the pi e e into the furnace, Whilethe fuel, if solid? is pulverized. and introduced into the aceseparately through the pipe f. When the air and fuel are discharged,they form a jet, the shape of which depends upon the relative positionsof the two nozzles g and h. The hot blast produced by the burning jetimpinges upon the material in the furnace which is traveling to- Wardthe 'et and, in the case of cement, effects the'clinkerin of the same.

Itwill be clear t at by moving the nozzles farther into the furnace, sothat the combustion will occur farther up in the cylindrical chamber a,the clinkering process, in the case of cement, will begin nearer theentrance of the raw material. If, therefore, it is discovered that thecement is not being delivered from the lower end of thecombustion-chamber properly clinkered, the nozzles may be so adjustedthat the clinkering shall begin at the pro er point in the chamber,whereby when t e cement is eventuall delivered therefrom it will beproperly clin ered. It will be understood that various changes may bemade in the apparatus illustrated herein for carrying out the inventionWithout is not limited to rota reference has been ma e s 'ecificallyhereindeparting from the spirit of the invention. It 20 wi 1 be furtherunderstood that this invention furnaces, to which before, but may beused in rnaces generally.

I claim as my inventionv The process of regulating combustionin afurnace which consists in moving the point of introduction of fuel orfuel mixture farther into the furnace or vice versa, and changing therelative osition of the openings through which air an fuel areseparately introduced, substantially as described.

This specification signed and witnessed this 11th day of March; A. D.1905.

- POUL LARSEN. In presence of" EMIL Ri'rsAGER, CHR. ENGELHARI'.

